I have the H.Viking Sapphire 830 with the 10 inch throat. It makes a big difference when doing free motion.
I paid 1100 for it when it first came out several yrs ago. It is much cheaper now. They make a 850 that does embroidery but it was too expensive at the time.
It is also hard to find a table to set it in flush because of the size. I bought a Burtha cabinet that was extremly hard to put togather but managed.
It is heavy so not a good choice for taking to classes.